To win the competition he has to beat his personal best, and he's going for it.
Go for it! You can win this!.
May I use your bathroom? ― Go for it!.
If John goes for three days without sleep, he will be very tired.
I'll go for a swim if it's warm enough.
My wife hates football, and that goes for me as well.
Careful, he'll go for your throat!.
I'll go for the World record.
I'll go for some milk.
... Oh, someone's made it around a full lap. ...
... Something might happen in the future that someone comes up ...